Press.



J. J, KINZER.

PRESS.

APPLIOAIIOH FILED 001119, 1912.

'1 Tffifl, Patented Nov. 4, 1913.

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To all whom it may concern:

Be it known that I, JOHN Jason KINZER, a resident of VVildwood, in the countyof Allegheny and State of Pennsylvania, have invented a. new and useful Improvement in Presses; and I do hereby declare the following to be a full, clear, and exact description thereof.

My inventionrelates to presses and more particularly to that class of machines known as geared presses or stamping machines hav- 'the lower die is perfectly stationary and the upper die moves downward by a cam or eccentric motion so as to reach a certain fixed distance above the lower die before starting to travel upward again. There is, therefore, just sufi'icient space between the respective dies for the material to be punched, pressed or stamped. In case the material-happens to be too thick or there is an excessive amount of the same, in case of pressing, some part of the machine must give way or break in order to allow the cam or eccentric to complete its revolution and thus bring the upper die toits raised or upper position. The part broken is often a very expensive die or some-part of the machine which is diliicult to repair'so that great expense is incurred and there is great danger of injury or loss of life from the. flying of the broken die' or parts of the machine. By making the bolster plate movable, 2'. e. adapted to be set at any pressure after whichthe same will yield to the action of the cam I prevent thebreaking of the machine and injury to persons likely to How from the same.

My invention consists, generally stated, in

the novel arrangement, construction and combination of parts as hereinafter more specifically set forth and described and par ticularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and Speoificetionof Letters Patent.

use my improved geared press I will describe the same more fully referring to the accompanying drawing inwhich the figure shows a front elevation of my improved gearedpress with 'some'of the parts in section.

. As illustrated in the drawing my improved geared press is mounted in a housing 1 and is provided with a suitable base 2 for supporting the same. On one side of the housing 1 are the ordinary. pulleys 3 for con nection by belt to any convenient source of power and such pulleys are mounted on a shaft 4 which extends through the housing 1 and is provided with a small pinion 5 at its other end.. The small pinion 5 meshes with a large gear 6 which is mounted on a shaft 7 above the shaft 4 and which is journaled in thehousing '1. Between the sides of thehousing 1 is a heavy cam or eccentric 8 which operates on the shaft 7 and is connected to the die mechanism 9 by means of a connecting rod 10 which allows for the cam motion of said parts. An upper die 11 is adjustably mounted in the die mechanism 9 and such die may be of any size or style, such as for punching, pressing, stamping or anything adapted to this particular style of machine. Below the upper die 11 is the lower die 12 which is mounted on the,

bolster plate 13; and in other machines such bolster plate is ordinarily stationary being securely fixed to the honsingl, whilein my improved press such bolster plate is mounted on a plunger 14 which operates in a hydraulic cylinder 15. The hydraulic cylinder 15 is securely attached to the housing 1 and may be of any area desired in order to get the necessary pressure for the particular class of work contemplated.

On one side of the housing 1 is an accuinulator mechanism 16 which consists of a cylinder 16 which has a, rod plunger 17 adapted to operate therein and such rod plunger is connected at its upper end-to a lever 18 which lever is secured at its inner end to a lug 19 on the side of the housing- 1 and has a weight bar-2O at its other end upon which any desired number of weights 21 Patented Nov. 4,1913.- Application filed October 19,1912. Serial No. 726,750.

may be hung in order to give the required pressure. The lever 18 may be of any length,

desired in order to multiply the pressureex-' erted at the lower end of the rod plunger 17.? 1

The cylinder 16 has awater-chambr 22 the same and water ;is supplied-thereto from a water tank 23! communicating therewith by'means ofa pipe 24 and a, passageway 26 inffhe side of said cylinder. The passageway 25 has a small valve 26 operating within the same and such valve-1s held in place by means of a weighted lever 27 bearing against th e same in order to prevent the water in the iter 'chamber 22 from being passed back into the tank 23 under ordinary circumstances as later explained. At the bottom of the cylinder 16 and communicating with the water chamber 22 is a pipe which extends around to the bottom of the hydraulic cylinder 15 and communicates therewith.

Immediately above the bolster "plate 13 and secured to the side of thehousing 1 are a pair of stop plates 29 which are adapted to limit the upward movement of the bolster plate, as later eaplained.

The operation of m 'mproved geared press is as follows:T e upper and lower dies 11 and 1-2 areadjusted to position in the die mechanism 9 and on the bolster plate.

13 respectively and are set, so. ,asto give the necessary clearance for the material when the bolster plate 13 is against'the stop platesv v '29.

l/Veights 21 are now placed on the weight baa-20, the water chamber 22, the

pipe 28, and lower part ofthe hydraulic cylinder 15 having been filled with water. The number of pounds weight placed on the weight bar 20 will depend upon the number of pounds pressure that is desired to be exerted on the bolster plate 13 or lower die 12 as-the length of the lever 18 will multiply the amount of pressure exerted at the lower end of, the rod plunger 17 and as the area of the hydraulic cylinder much greater than the area of the rod plunger 17 tl e pressure of the water in the saidcylindei' i i ill be again multiplied. In this manner the press'ureon the plunger l t may be regulated as desired by the addition or withdrawalof the weights 21 on "the weight bar 20. The machine is now set in niotionand the cam 0r eccentric 8 will cause the upper die to be [pushed downward'so as to engage theme-- terial to be pressed, stamped or punched and such die must pass downward the entire distance to which the same is set in order to allow the cam or eccentric to make its com plete revolution and thus raise the said die to its raised position. This action of the cam or eccentric 8 is exerted with a certain number of pounds pressure so that if a repelling force of greater pressure were exerted against the same some part of the machine must break in order to allow the coccntric or cam 8 to complete rcvoluti )1].

In my improved gear press the amount of pressure exerted against the bolster plate 13 by the hydraulic action against the bpttom of the plunger 14 is slightly less thaii the vpressureexerted by the cam or eccentric .8

. so that in case the material being acted upon by the dies 11 and 12 is too thick or the quantity of the same-is too great the lower upon the defective material may be removed and the machine will not be injured in any way. After the water has been expelled from the hydraulic cylinder 15 and connect ing parts the bolster plate 13 must be raised against the stop plates 29 and the hydraulic cylinder again filled with Water before the machine is ready for operation.

The stop plates 29 will always limit the raised position of the bolster plate 13 and lower die 12 by extending outward and engaging with the-upper surface of the same.

In cases where it is necessary to have some die mechanism immediately below the lower die 12 two or more hydraulic plungers may 'beused bybeing spaced at the corners of the bolster plate or one at each end of the same.

My improved geared press will be of special advantage in cases where it is desired to gct'ija certain deti'nite pressure upon the article being acted upon, as in such a case the weight may be regulated to give the desired pressure an excess of which exerted by the upper die will cause the bolster plate 13 to be lowered sothat such 'pressure cannot-bc exceeded as aga nst the material being acted upon.

In some cases it hasbeen the practice to make one particular part of the machineweak so that when there was any opposition to the action of the dies such weak part would break and thus not injure any other part of the machine or the .die's but this -,practice is very unsatisfactory as it may require considerable time to make the repairs. or the necessary new parts may not be at hand. It will, therefore, be seen that with the use of my improved gear press the likelihood of the gear parts being injured or broken by the action of the dies on the material being acted upon is entirely eliminated and the regulation of the accumulator, pressure makes its use adaptableto all kins of gear press work. The elimination of the possibility of breaking the machine will thus save. considerable expense and annoyance v,

and will render it safe to work around such machine without fear of serious injury or loss of life...

Various modifications and changes in the design, operation and construction of m ii'nproved geared press as also the substitut1on of compressed air, 011 or other liquid remain for the operating fluid, may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

What I claim as my invention and desire to secure by Letters-Patent is 1. A geared press having a die adapted to "be raised and lowered, another die for cooperating with said first-named die, a bolster plate for supporting said last-named die, a plunger connected to said plate and operating within a cylinder, and an accumulator device consisting of a cylinder connecting with said first-named cylinder and having a rod plunger therein for multiplying the pressure exerted below said plunger to permit said bolster plate and last-named die to yield when the pressure of said firstnamed die becomes excessive.

2. A geared press having a die adapted to be raised and lowered, another die for cooperating with said first-named die, a bolster plate for supporting said last-named die, a plunger connected to said plate and operating within a cylinder, an accumulator device consisting of a cylinder connecting with said first-named cylinder and having a rod plunger therein for multiplying the pressure exerted below said plunger to permit said bolster plate and lastnamed die to yield when the pressure of said first-named die becomes excessive, and meansfor fixing the normal position of said bolster plate and last-named die.

A geared press having a die adapted to be raised and lowered, another die for cooperating with-said first-named die, a bolster plate for supporting said last-named die, 'a plunger connected to said plate and operating within a cylinder,an accuuiulator device consisting of a cylinder having a rod plunger therein connected to a lever andweights on said lever at a distance from said rod plunger for multiplying the pressur'oexerted below said plunger to permit said bolster plate and last-named die to yield when the pressure of said first-named die becomes excessive.

,4. A geared press having a die adapted to be raised and lowered, another die for cooperating with said first-named die, a bolstcr plate for supporting said last-named die, a plunger connected to said plate and operating Within a cylinder, an accumulator device consisting of a cylinder having a rodplunger therein connected to a lever, and weights on said lever at a distance from said rod plunger for multiplying the pressure exerted below said plunger to permit said bolster plate and last-named die to ield when the pressure of said first-name die becomes excessive, and means for fixing the normal posit-ion of said bolster plate and last-named die.

5. A geared press having a die ada ted to be raised and lowered, another die or cooperating with said first-named die, a bolster plate for supporting said last-named die, a plunger connected to said plate and operating within a cylinder, an accumulator device consisting of a cylinder of smaller diameter than said first-named cylinder,

said last-named cylinder having a rod plunger therein connected to a lever, and weights on said lever at a distance from said rod plunger for multiplying the pressure exerted-below said plunger to permit said bol ster plate and last-named die to yield when the pressure of said first-named die becomes .ger therein connected to a lever, weights on said lever at a distance from said rod plunger for multiplying, the pressure exerted-below said plunger to permit said bolster plate and last-named die'to yieldwhen the pressure of said first-named diebecomes excessive, and means .for fixing the normal position of said bolster plate and last-named die.

In testimony whereof I, the said JoHN JACOB Kmznn,'have hereunto set my hand.

JOHN JACOB KINZ'ER. Witnesses:

T. B. Hniurnnrus, J. N. Coons. 

